Standardized Enthalpies and Entropies
Standardized enthalpies and entropies for some common substances.
Sponsored Links
Standardized enthalpies and entropies of some common substances:
| Substance | Entropy - s - | Enthalpy - h - | ||
|---|---|---|---|---|
| Btu/lbmole R | J/gmole K | Btu/lbmole | J/gmole | |
| Acetylene C2H2 | 47.97 | 200.82 | 97,495 | 226,757 |
| Benzene C6H6 | 64.3 | 269.21 | 35,653 | 82,923 |
| n-Butane C4H10 | 74.1 | 310.03 | -53,627 | -124,727 |
| Carbon Dioxide CO2 | 51.03 | 213.66 | -169,183 | -393,492 |
| Carbon Monoxide CO | 47.3 | 197.92 | -47,517 | -110,516 |
| Ethane C2H6 | 54.8 | 229.48 | -36,401 | -84,662 |
| Hydrogen H2 | 31.2 | 130.60 | 0 | 0 |
| Methane CH4 | 44.5 | 186.19 | -32,179 | -74,843 |
| Nitrogen N2 | 45.8 | 191.56 | 0 | 0 |
| Oxygen O2 | 48.99 | 205.09 | 0 | 0 |
| Propane C3H8 | 64.47 | 269.92 | -44,647 | -103,848 |
| Water H2O | 16.72 | 70.00 | -122,976 | -286,022 |
- equilibrium states at 25oC (77oF) and 1 atm
Go to Standard state and Standard enthalpy of formation for listing of standard enthalpy of formation and standard entrypy for more than 370 inorganic substances.
Sponsored Links
Related Topics
-
Thermodynamics
Work, heat and energy systems.
Related Documents
-
1st Law of Thermodynamics
The First Law of Thermodynamics simply states that energy can be neither created nor destroyed (conservation of energy). Thus power generation processes and energy sources actually involve conversion of energy from one form to another, rather than creation of energy from nothing. -
2nd Law of Thermodynamics
Entropy and disorder. -
Ammonia - NH3 - Thermodynamic Properties
Thermodynamic properties of saturated and superheated ammonia R-717 like specific volume, enthalpy and entropy. -
Heat, Work and Energy
Heat vs. work vs. energy. -
Standard State and Enthalpy of Formation, Gibbs Free Energy of Formation, Entropy and Heat Capacity
Definition and explanation of the terms standard state and standard enthalpy of formation, with listing of values for standard enthalpy and Gibbs free energy of formation, as well as standard entropy and molar heat capacity, of 370 inorganic compounds. -
Steam and Vapor Enthalpy
Vapor and steam enthalpy, specific enthalpy of saturated liquid, saturated vapor and superheated vapor. -
Steam Entropy
Basic steam thermodynamics - entropy diagram. -
Superheated Steam - Entropy
The entropy of steam superheated to temperatures above saturation points. -
Thermodynamic Key Values Internationally Agreed
Internationally agreed, internally consistent, values for the thermodynamic properties (standard enthalpy of formation, entropy and [H°(298)-H°(0)]) of key chemical substances. -
Third Law of Thermodynamics
The entropy of a substance is zero if the absolute temperature is zero. -
Units of Heat - BTU, Calorie and Joule
The most common units of heat BTU - British Thermal Unit, Calorie and Joule. -
Water - Thermophysical Properties
Thermal properties of water at different temperatures like density, freezing temperature, boiling temperature, latent heat of melting, latent heat of evaporation, critical temperature and more.
